Valve.



A. BOATS.

VALVE.

APPLICATION FILED ocT. 4. 1910.

Patented Aug. 1T, 1915.

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.t/la Si 7 7/ mm @ai W/TNESSES I www ALLAN COATS, OF NEWARK, NEW JERSEY.

VALVE.

Application filed October 4, 1910.

To all whom it may concern:

Be it known that I, ALLAN'COATS, a subject of the King of Great Britain,residing at Newark, in the county of Essex and State of New Jersey, haveinvented certain Improvements in Valves, (for which I liled anapplication in Great Britain, October 4, 1909, No. 22584,) of which thefollowing is a specification.

This invention relates to valves of the combined fluid and mechanicallyoperated type, such as are used for steam pumps and the like. v

The objects of the invention are to simplify the construction, to rendermore certain the operation, and to reduce the wear, in combined fluidand mechanically operated valves, and to obtain other advantages andresults as may be brought out in the following description.

Referring' to the accompanying drawings, in which like numerals ofreference indicate the same parts throughout the several figures, Figurel is a plan of the valve proper and operating caps, showing the saidvalve proper at vone end of its travel; Fig. 2 is a central longitudinalsection of the complete valve and casing taken on` line 2-2 of Fig. lwith the valve in the same position; Fig. 3 is a cross section of thevalve on line 8-8, Fig. l, looking toward the right hand end of saidfigure, and Figt is a cross section on line 4 4, Fig. 2, looking towardthe left hand end of said ligure.

In said drawings, A indicates a central spindle which receives acircumferentially reciprocating motion or oscillation from anyreciprocating part of the pump mechanism by means of any suitableconnection which mechanical skill may suggest. I have shown, toillustrate oscillating means, one end of the spindle projecting andprovided with a crank arm A, which can be suitably connected to the pumpmechanism to turn the spindle back and forth through a small arc. On`this spindle A are fastened caps B and C, their relative position onthe'spindle being fixed by means of keys V, V1, oI the like.` To theoutsides of these caps are fastened plates D and E. These plates servethe double purpose of forming covers for the exhaust shooting passages`F and G in the caps B and @,respectively, and also as a means to partlythrottle lthe main steam passages L, L1 to the pump, should this bedesired. This throttlingis done by having Speccation of Letters Patent.

the latter, I),

Patented Aug. il?, i915. Sera1No.585,175.

said plates long enough so that each plate always overlies,longitudinally of the valve, that. transverse portion of the valveproper, I-I, 1n which the steam passage L, or L1, nearest the said plateis located, and then making the length of said ports transversely of thevalve in such relation to the width or' the plates, and so locatedcircumferentially with respect to said plates, that as the capsoscillate, their said plates cover the active inlet port and uncover theother or idle port as the pump piston gets near the end of its stroke.This serves the usual purpose of a cut oil, but it is preferable thatthe closure be not complete lest the piston should not properly completeits stroke and thus fail to oscillate the caps to shoot the valve. Theplates D, E, do not therefore necessarily bed on the main steam valve orshootf ing valve H, but are spread slightly therefrom, as shown in Fig.2.

The caps B and C are closed at their ends away from each other and intheir' circumferential walls they have exhaust shooting passages F, G,and steam passages J, K, respectively. Said exhaust shooting passages F,G, as alreadystated, are covered by the plates D, E, while the steampassages J, K have a clear way through the caps B, C. Inside the caps B,C, the main steam valve H works. This valve H has suitable steampassages L, L1, and M, M1, and eX- haust passages N, N1, connected tothe pump cylinder, and is shown with a central hole to admit drivingspindle A, though any other method of circumferentially reciproeatingthe caps B and C may be employed.

In the main steam valve I'I, suitable steam shooting ports It and S, andexhaust steam shooting ports I), Q5, are provided, so that Q, areconnected to the main exhaust passage T of the valve I-I and the former,It, S, are connected to the chambers inclosed between the caps B, C, andthe valve H.

The action of the mechanism is as follows: When the central spindle A ispartially rotated, the sleeves B, C rotate with it, but the valve I-Idoes not, being held up against the steam cylinder face by the steampressure. As shown in Fig. l, the opening J in cap B admits steam bymeans of passage R to the left hand of valve H. Vhen further traveltakes place, the passage G cut in the cap allows steam from between theright hand of valve I-I and the cap C to escape by having a shootingvalve,

means of the passages G, Q to the main eX- haust chamber T, and thuscauses the valve H to shoot over to the right in direction of cap C.Steam is thus admitted by means of port L to the main pump passage M2leading to one end of the cylinder, While the passage lvl3 from theother end is connected by means of the passages N, N1 to exhaust X. 'lhepiston then commences its stroke, and when near the end thereciprocating mechanism commences to rotate the spindle `in the oppositedirection by means or' lever A2.

To prevent the valve H from sticking on its seat, pins W, X2, or theirequivalent, may be set so that the 'plates D, E alternately strike theVpins W, X2 `and allonT the valve to shoot. These pins lV, X2 alsoprevent the valve H from moving materially from its correct` radialposition.

lOn the caps B, C being rotated in the opposite direction, thecorresponding' Aports' on the opposite side of the come intooperation,andat the proper timethe valve H shoots back to its original position.

It Will be noted hat the ports Gr, Q, and F, P have meeting ends Whichare inclined or oblique to the direction of movement of the ports cominginto registration,

thus a greater areaI of registration is more quickly secured and a morequick response of the valve proper.

Having thus described the invention, vvhat Iclaim is: y 1

l. Thecombination With a fluid-,operated pump, of a shooting valvehaving caps at either end, means to circumferentially reciprocate saidcaps, and means to control by means of the movement of said caps theadmission and exhaust of fluid to the spaces inclosed between the endsof said shootingl valve and caps. 2

2. The combination With a fluid-operated pump, of a shooting valvehaving caps at either end, means to circumferentially reciprocate saidcaps, and means to partly throttle by meansof the movement of said capsthe flow of fluid to the main cylinder when the piston approaches theend of its stroke.

3. rlhe combination With afluid operated pump, of a shooting valvehaving caps at either end, means to circumferentially reciprocateA saidcaps, and means coacting! with said caps to prevent said shooting valvefrom sticking to its seat.

4l. A valve of the character described, caps for the ends of saidshooting valve, and means for oscillating said caps to admit a pressurefluid to one end of the shooting valve and eXhaust it from the other endand then admit to the second end and exhaust from the first end.

5. A valve of the character described, having a longitudinallyreciprocable valve proper With ports, caps slidably fitting the ends ofsaid valve proper and having ports, and means for oscillating said capsto move the ports of said caps operatively With respect to the ports ofthe valve proper.

6. A valve oi" the character described, having a shooting valve, capsfor the ends of said shooting valve, means for oscillating said caps,and means for imparting a portion of the oscillation of said caps tosaid shooting valve.

A valve or the character described, having a shooting valve, caps forthe ends of said shooting valve', means for oscillating said caps, andstops onthe shooting valve adated to be engaged by said caps at bpposite ends oftheii' arc of oscillation.

8. A valve of the character described, having alshooting valve, caps forthe ends of said Ashooting valve, means Afor oscillat ing said caps, andstops on said shooting 85 valve at opposite ends of the arc ofoscillationof saidcapsadapted to limit turning f the snootingyalve.

9. A valve of the character described, having a shotingvalve, `caps forthe ends of said shooting valve, means for oscillating said caps, platesprojecting lfongitudi-V nally from said caps, and stops on` theshootingvalve at opposite sides of said plates.

10. Ina valve of the Character described,

the Acombination With a valve proper, and Ineans 'for admitting pressurefluid to move said valve proper, of means for automatically movingsaidvalve in another direction l to prevent it from sticking. 1l.`Inavalve of the character described,

the `combination lWith a longitudinally reciprocable valve proper, andmeans for admitting pressure fluid te move said valve proper, of 4meansfor automatically impart# 105 ing to' said valve proper a rotarymovement to release it from sticking.

l 12. The combination of a valve proper having passages openingcircumferentially and provided with an oblique Wall, caps for the endsof said valve proper having passagesadapted to register With said valvepassages and provided with similar oblique Walls, and means foroscillating said caps so as to move saidlobliqne Walls of the pas` 115sages into and out of registration cni necting and disconnecting saidpassages.

13. ln a valve of the character described, 2 thecombination of ashooting valve having inlet prts separated both longitudinally 120 andcircumferentially, caps for the ends of said shooting valve, means 'for4 o'scill` latingsaid caps, and plates on said caps adapted to throttlesaid ports alternately,

14;. In a valve of the character described, 125 the combination of ashooting valve having inlet ports separated both longitudinally andcircumferentially,caps for the ends of said shooting valve, means foroscillating said caps, and plateson saidV caps extending longitudinallyof the valve one over each port and adapted to alternately partiallyclose said ports as the caps oscillate.

15. In a valve of the character described, the combinationof a shootingvalve having inlet ports separated both longitudinally andcircumferentially, caps for the ends of said shooting valve, means foroscillating said caps, and plates on said caps eX- tendinglongitudinally of the valve one over each port, said plates being Widerthan said ports and spaced from the valve.

16. In a valve of the character described, the combination of a shootingvalve having inlet ports, caps for the ends of said shooting valve,means for oscillating said caps, plates Copies of this patent may beobtained for five cents each,

on said caps adapted to throttle said ports alternatel and stops on theshooting valve at opposite sides of said plates to limit turning of saidshooting valve.

17. In a valve of the character described, the combination of a shootingvalve having inlet ports, caps for the ends of said shooting valve,means for oscillating said caps, plates on said caps adapted to throttlesaid ports alternately, and stops on the shooting valve at oppositesides of said plates and adapted t0 be engaged thereby as the capsoscillate.

ALLAN COATS.

In the presence of- RUssELL M. EVERETT, FRANCES E. BLODGETT.

by addressing the Commissioner of Patents.

Washington, D. C.

